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发明名称
Controllable-pitch propeller system
摘要
申请公布号
US2786539(A)
申请公布日期
1957.03.26
申请号
US19480062017
申请日期
1948.11.26
申请人
NICHOLS HARRY J
发明人
NICHOLS HARRY J.
分类号
B63H3/08
主分类号
B63H3/08
代理机构
代理人
主权项
地址
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